1 /*
2 * msvcrt.dll environment functions
3 *
4 * Copyright 1996,1998 Marcus Meissner
5 * Copyright 1996 Jukka Iivonen
6 * Copyright 1997,2000 Uwe Bonnes
7 * Copyright 2000 Jon Griffiths
8 *
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
13 *
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this library; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
22 */
23 #include "wine/unicode.h"
24 #include "msvcrt.h"
25 #include "wine/debug.h"
26
27 WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
28
29 /*********************************************************************
30 * getenv (MSVCRT.@)
31 */
32 char * CDECL MSVCRT_getenv(const char *name)
33 {
34 char **environ;
35 unsigned int length=strlen(name);
36
37 for (environ = *__p__environ(); *environ; environ++)
38 {
39 char *str = *environ;
40 char *pos = strchr(str,'=');
41 if (pos && ((pos - str) == length) && !strncasecmp(str,name,length))
42 {
43 TRACE("(%s): got %s\n", debugstr_a(name), debugstr_a(pos + 1));
44 return pos + 1;
45 }
46 }
47 return NULL;
48 }
49
50 /*********************************************************************
51 * _wgetenv (MSVCRT.@)
52 */
53 MSVCRT_wchar_t * CDECL _wgetenv(const MSVCRT_wchar_t *name)
54 {
55 MSVCRT_wchar_t **environ;
56 unsigned int length=strlenW(name);
57
58 for (environ = *__p__wenviron(); *environ; environ++)
59 {
60 MSVCRT_wchar_t *str = *environ;
61 MSVCRT_wchar_t *pos = strchrW(str,'=');
62 if (pos && ((pos - str) == length) && !strncmpiW(str,name,length))
63 {
64 TRACE("(%s): got %s\n", debugstr_w(name), debugstr_w(pos + 1));
65 return pos + 1;
66 }
67 }
68 return NULL;
69 }
70
71 /*********************************************************************
72 * _putenv (MSVCRT.@)
73 */
74 int CDECL _putenv(const char *str)
75 {
76 char *name, *value;
77 char *dst;
78 int ret;
79
80 TRACE("%s\n", debugstr_a(str));
81
82 if (!str)
83 return -1;
84
85 name = HeapAlloc(GetProcessHeap(), 0, strlen(str) + 1);
86 if (!name)
87 return -1;
88 dst = name;
89 while (*str && *str != '=')
90 *dst++ = *str++;
91 if (!*str++)
92 {
93 ret = -1;
94 goto finish;
95 }
96 *dst++ = '\0';
97 value = dst;
98 while (*str)
99 *dst++ = *str++;
100 *dst = '\0';
101
102 ret = SetEnvironmentVariableA(name, value[0] ? value : NULL) ? 0 : -1;
103
104 /* _putenv returns success on deletion of nonexistent variable, unlike [Rtl]SetEnvironmentVariable */
105 if ((ret == -1) && (GetLastError() == ERROR_ENVVAR_NOT_FOUND)) ret = 0;
106
107 /* Update the __p__environ array only when already initialized */
108 if (MSVCRT__environ)
109 MSVCRT__environ = msvcrt_SnapshotOfEnvironmentA(MSVCRT__environ);
110 if (MSVCRT__wenviron)
111 MSVCRT__wenviron = msvcrt_SnapshotOfEnvironmentW(MSVCRT__wenviron);
112
113 finish:
114 HeapFree(GetProcessHeap(), 0, name);
115 return ret;
116 }
117
118 /*********************************************************************
119 * _wputenv (MSVCRT.@)
120 */
121 int CDECL _wputenv(const MSVCRT_wchar_t *str)
122 {
123 MSVCRT_wchar_t *name, *value;
124 MSVCRT_wchar_t *dst;
125 int ret;
126
127 TRACE("%s\n", debugstr_w(str));
128
129 if (!str)
130 return -1;
131 name = HeapAlloc(GetProcessHeap(), 0, (strlenW(str) + 1) * sizeof(MSVCRT_wchar_t));
132 if (!name)
133 return -1;
134 dst = name;
135 while (*str && *str != '=')
136 *dst++ = *str++;
137 if (!*str++)
138 {
139 ret = -1;
140 goto finish;
141 }
142 *dst++ = 0;
143 value = dst;
144 while (*str)
145 *dst++ = *str++;
146 *dst = 0;
147
148 ret = SetEnvironmentVariableW(name, value[0] ? value : NULL) ? 0 : -1;
149
150 /* _putenv returns success on deletion of nonexistent variable, unlike [Rtl]SetEnvironmentVariable */
151 if ((ret == -1) && (GetLastError() == ERROR_ENVVAR_NOT_FOUND)) ret = 0;
152
153 /* Update the __p__environ array only when already initialized */
154 if (MSVCRT__environ)
155 MSVCRT__environ = msvcrt_SnapshotOfEnvironmentA(MSVCRT__environ);
156 if (MSVCRT__wenviron)
157 MSVCRT__wenviron = msvcrt_SnapshotOfEnvironmentW(MSVCRT__wenviron);
158
159 finish:
160 HeapFree(GetProcessHeap(), 0, name);
161 return ret;
162 }
163
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